By now David and Sue had got a serious relationship going. He now came to our house on Saturday nights to fuck her and then we met up on Sunday afternoons as well so the two of them could screw. On one particular Saturday night Sue, as usual, went upstairs to get in bed ready for David. I went to check on her about 9.30 and she looked stunning. Her short blonde hair contrasted with the scarlet see-through teddy she wore and her long legs looked great covered in red hold-up stockings. She had put black satin sheets on the bed, just for her and David. I felt like fucking her there and then but I knew she would not allow it. I might get sloppy seconds when he had gone if she felt like it. The doorbell rang and I went down to let David in. He never even said hello, just went straight up the stairs. I went into the living room and could hear the low murmur of conversation above me. Within 15 mins the bed started to creak in rhythm and I knew his cock was buried in her. I had my cock out as I waited for the phone call to summon me upstairs.After a few minutes it came and I hurried upstairs wanking as I went. Sue was on her knees with the teddy up round her shoulders. She was squealing out Davids name over and over as he fucked her. Her large tits swung back and forward as he pounded in to her and his thick cock was coated with her cum juices as he pushec in and out. "We want you to be here at the exact moment she conceives," he grunted, never missing a stroke. "Oh Henry, I want his baby, you are my husband but I love him," she gasped. " David, let us know when you are going to shoot up in me and Henry, you wank yourself off at the same time," she said, her body shiny with sweat. I couldnt help it, when he gave the word I wanked like hell and we all came together. Afterwards they allowed me to lick them both clean before they fucked again.